editing_done

This signal is a sign for the cell renderer to update its value from the cell_editable.

Implementations of `GtkCellEditable` are responsible for emitting this signal when they are done editing, e.g. `GtkEntry` emits this signal when the user presses Enter. Typical things to do in a handler for editing_done are to capture the edited value, disconnect the cell_editable from signals on the `GtkCellRenderer`, etc.

editing_done is a convenience method for emitting `GtkCellEditable:GtkCellEditable:editing-done`.